What is the full scientific name for a labrador?

The nomenclature of a Labrador (domestic dog) is Canis lupus familiaris "Labrador."

The phylogenic tree of a Labrador is:

Domain: Eukarya

Kingdom: Animalia

Phylum: Chordata

Subphylum: Vertebrata

Class: Mammalia

Subclass: Theria

Infraclass: Eutheria

Order: Carnivora

Suborder: Caniformia

Family: Canidae

Genus: Canis

Species: Lupus

Subspecies: Familiaris

Breed: Labrador